Depth cut indicator



Oct. 13,-1931'. A. SCHMID 1,327,265

' DEPTH CUT INDICATOR Filed Dec. 31, 1929 3 Sheets-Sheet 1 A. SCHMIDDEPTH CUT INDICATOR Filed Dec.

Oct. 13; 1931.

s Sheets-Sheet 2 MO IAW Oct. 13,1931. A. SCHMID 1,827,265

' DEPTH CUT INDICATOR Filed Dec. 31, 1929 s Sheets-Sheet 5 WWW Anson".scnivrm, or Huirri-ive'rou, zwisls'r ,VIBGINIA; Assisi 101x101:rwo-rii nns To.

a I HERBE TLANG,an unsxnnxnsonn vn eItANrYERnEson, L]; or HUNTINGTON,

1 a @DEPTHCUT INDICATOR a j s," ,1Appiieationflfiled becember"31, 1929.ser also.;4e,78 ,1g

l c This inventionrelates toicutlin'dicators for 7 lathes andsimil'armachinery" and has for an object toprovide a device foruse mad-just ingthe tool tocut or turn apiece ofwork of -5 any desired depth and whichwill indicate the depth of cutwhile the'work is being cut or Thebracket19*is 'provided terminally with v spaced bearings 22and 23andqbetween these bearings with a bearing' 24; The bracket .20 isprovided; 'terminallywith a bearing 25; which is in alinement with thebearings 22 v and 23 and in these, 'alined bearings there is carriedatubular shaft 26; i A cross feed shaft turned. I l

A further object is toprovidea cut indicator for lathes whichwill be ofsimple con-f struction and'convenient to: manipulate and which will givemicrometer; measurements automatically ofthe'depth of the cut.

"With'the above and other Objects in View the" invention consists ofcertain novel, de-

tails of construction 'and combinations of parts hereinafter fully,described and and is journaled in the bearingx24 of themanually/operatingtheshaft and with'a gear train indicated ingeneral-M29 to' cwhich" operatingthe cross-feed shaft'by power when; 1 I

secured as shown a 21 to'th'e carriage '1 -27 is'mounted at one end ofthe'carriage'lO h 1 bracket19. "The cross feed'shaft'is provided E' a fV at one end with'the usual hand'wheelf28 for f in power inay be appliedthroughagar for: 5

claimed, it being funders'tood that" various modifications' may beresorted within the 5 scope ofthe appended claims without sacridesir'ediThe opposite end of thecross'feedshaft is'equip'ped withagear'31'which'meshes i with a gear 32 carriedby a stub shaft-33 as"'"-'3 shown in Figure 5; r I

best shown in Figure 4. The stubfshaftis n2 ficing anyof the advantagesorldeparting' p mounted ,in'sultable bearings El i-carried by from theispirit ofthef invention; 5 y In'the accompanying drawings, I I I Figurelis a SldQIelQYatl Ilpf the.,device, v Figure2 isfa plan view of thedevice with 5 arts insectiomtaken on the vline 2-2 of igurel; i- IFigure 3 is adetail view of the cam, onthe line3 3Fig. 2, I n y Figuresis a detail sectional View taken on 80 the line &4 of Figure 2,

' 'Figu-reo is a detail sectional view showing the micrometer bar'andmicrometer collar,

' Figure 6" is anend elevation" of the parts bracket 19 and between-the,arms 'a' worm 36 is mounted on'the stubsshaftand'meshes with a pinion3,7 whichis'k eyedto the above men tioned' tubular shaft 26 andcauses.the latter to rotate whenthe cross feed shaft is turned. I Thistubular'shaft through the instrumental v v v '85 5 Referring now to thedrawiii'gsin which i like characters of reference designatesimilar Ipa'rts in the various 'viewsythe numeral-'10 designates the carriage'of-a latlie,--the(car'-' 1 riagebeing movable lon gitudinally on]guides 11 through the instrumentality of a' rack' 1 2 "andpin ion13 intheusualimanner A cross slide 14 is mounted 'n;guide s 15 on..,thecarriage andwcarries Tthe'usual com- 145 pound-slide 16 which supportsthetool post 17 in which the cutting tcol 18 is mounted. Theseparts areof the usual and well known lathe construction. 7 I In carrying-outtheijnvention "a pair of 1 bracke s 19 d. 2 a e, b lte o erwi elias-best sh-ownin Eig'ureSf andrides upon the peripheral faceof- 'thecam.- A pairof rollers and 46' are carried by the terminals: ofthebranches39 and 40 and ride againstt'he web'of the cam and-against theinnerper'iph eral faces of-the'cam as shown. It is now clear that whenthecro'ssv feed shaft=27 is tur'ned, that the cam 38, will be moved andwill inovethe cross slide 1-1 forwardor backward slide may be measuredand consequently the arms35'which extend downwardly fro m the ity'of acam mechanism about to be described, j 1 so bracket by-mean'sof a yoke43and a set screw a to i accordingto the directionofrotation ofthe a Inorder as the movement 01:" the cross I ldepthaof the cut madebytll toolmeasured a 2 and indicated, the tubular shaft 26 is equipped with a gear47 which meshes with a gear 48 carried on a stub shaft 49 which projectsfrom the bracket 20, on this same shaft there being keyed a gear 50which meshes with a pinion 51. The pinion is keyed as shown at 52 to asleeve 53 which is housed within the tubular shaft 26 and is equippedopposite the pinion 51 with a micrometer collar 54. t

A micrometer bar 55 is mounted to move longitudinally within the sleeveand is held against turning therein by a key 56 fixed to the side of thebracket 19 as best shown in Figure 5. The micrometer bar through themicrometer collar at one end and at the opposite end is threaded asshown at 57, these threads engaging similar threads 58 formed on theinner face of the micrometer sleeve 53 so that when this sleeve isturned through the instrumentality of the gears above described, themicrometer bar will be simultaneously moved longitudinally withinthesleeve. The micrometer bar is provided with graduations as shown inFigure 2 and alsothe micrometer sleeve is provided with graduations asshown in Figure 6, it being understood that the units may be read on themicrometer bar and the fractions thereof on the micrometer collar in theusual manner. In the present embodiment of the invention, the micrometercollar is graduated into one hundred equal parts and the micrometer barisgraduated in inches, each inch being graduated into ten equal parts.The micrometer bar is threaded ten threads to the inch.

In the present embodiment of the invention the above mentioned gear 4:?carried by the. tubular shaft 22 is provided with two hundred teeth, thepinion 48 with twenty teeth, the gear 50 with two hundred teeth and thepinion 51 with twenty teeth. Other gear ratios maybe employed to movethe micrometer sleeve and the micrometer bar relative to each other.

It will now be clear that when the cross feed shaft 27 is turned thatthe tubular shaft 26 will be turned and will-simultaneously move the cam38 to move the transverse slide 14 and at the same time move themicrometer bar 55 and micrometer collar 54 to measure and indicate theextent of movement of the transverse slide 14:, and cutting tool 18.

An indicator arm 59 is provided at one end with a sleeve 60 which fitson the bearing 25 ofthe bracket 20. The indicator arm is providedterminally with a bearing 61 which receives a stem 62 of a head 63 whichcarries a disc 64%.. The face of the disc is in the exact center of thelathe when the arm is rocked down to operative position as shown in Figure 1 and forms an abutment for the cutting edge of the tool for placingthe tool accurately on the center line of the lathe. The arm 59 may beswung back out of the way extends of the head 63, which as shown, is atzero. The tool is now set for making a cut and the indicator arm 59 maybe swung back out of the way. The cross feed shaft 27 may now be turnedto move the cross slide and tool carried thereby sufiiciently to performthe desired depth of cut. Since the micrometer bar and the micrometercollar are simultaneously actuated during any movement of the cam 38'toactuate thecross slide, the depthof the cut will be indicated by thesemicrometer members.

The shape of the cam maybe varied in accordance with whether the work tobe cut or turned is inside or outside work such as bottle molds, etc. Bychanging the ratio of the gear train indicated at 29, as will be readilyunderstood, the tool may be actuated to cut a taper.

From the above descriptionit will be readily seen that the micrometerbar and collar will indicate the exact depth of cut a tool is makingduring the cutting operation and will automatically indicate any. changein the depth of the cut. 7

It willbe further understood that the device is applicable to othermachinesbesides lathes and may be used on any type of machine employingcutting tools or operating on any type of material, since thedevicecontemplates in a broad sense, essentially the use of a cam forcontrolling the depth of. a cut and an indicator synchronized with themovement of thecam and operating to continuous- 1y indicate the depth ofthe out while it .is being made. Y Y Y It will be further understoodthatthe cam shaft may be made solidand the-cam graduated to read inconjunction-with a venier scale if desired. Y 7 y Y Having thusdescribed, the invention,;[ claim: Y

1. The combination with the carriageand the tool supporting cross slideof a lathe, of

the tool supporting cross slide of a lathe, of a tubular shaft, a cam onthe tubular shaft for actuating the cross slide, a cross feed shaft foractuating the tubular shaft, a sleeve within said tubular shaftterminating in a micrometer collar, a micrometer bar slidablelongitudinally within said sleeve,ineans' operatively connecting saidsleeve-and said tu-' bular shaft and means operatively connect ingsaidtubular shaft and said micrometer bar. 3. The combination with thecarriage and the tool supporting cross slide of a lathe,'of

a disc on said head adapted to form an abuta'cam carried by thecarriage, a cross feed shaft for actuating the cam, a bracket on the 9 icross slide, a roller on said bracket engaging the outer periphery ofthe cam, a rolleron said bracket engaging the inner periphery of saidcam, said rollers coacting in imparting movement of said cam to sa1dcross sl1de,and

a micrometer bar 'slidable transversely of the 4:. The co'mbination'withthe carriage andthe tool supporting cross slide of a lathe, a tubularshaft carriedby said cross slide, of an arm pivoted on said carriage andadapted to be rocked towards the longitudinal center of thelathe, andconfront the tool carried by the tool holder, .a head on said arm, a

mentfor'the cutting edgeof said tool for positioning the latter in theexact center of said lathe, a camon said tubular shaft operaconnectingthe sleeve and the micrometer bar whereby when the sleeve is turned themii" crolneter vbar thereof. I V 7. In a machine having a movable slidefor actuating a cutting tool to make various sizes of cuts, a cam foroperating the slide, a micrometer bar slidable transversely of the ismoved longitudinally cam and operated by movement of the cam I forindicating the movement of said slide whereby to-indicate the depth ofcut made by saidrtool, and meansforsimultaneously I actuating said camand said micrometer bar.

I 8; In a machine for making cuts in mate- I V so p rial,fthecombination -of, a cam for controlling the depth of the out, and amicrometer bar slidable transverselyof the cam and opv erated by the camfor indicating the depth 1 o ofthe cut while it is being 'nade;

9. In a machine for making cuts in material, the combination of a camfor controlling thedepth ofthe cut, a micrometer bar s'lidabletransversely of the cam for indicating'the depth of the cut, and v meanssynchronizing the cam and the micrometer bar for simultaneous operation.

AN o soHMIn. [1 s] tively connected to said .cross'sli'de for movlng thecross slide, and 'a micrometer bar slidable through the tubular shaftand opp eratively connected to said cam for indicat ing movement of saidcross slide whereby to indicate the depthof the cut made by the cuttingtool. Y i T 5. The combinationwithzthe' carriage and I the cross slideof a-lathe, ofsp'aced brackets carried by the cross slide, a tubularshaft journaled in said brackets,a cross feed shaft carried by one ofsaid bracket s,'and geared to said tubular shaft, a cam disposed on saidtubular shaft between said brackets, a

bracket on said cross slide, 1 means opera tively connecting the cam tothe last named 56 an indicating device operatedby said tububracketwhereby the cross slide is moved when the cross feed shaft is actuated,and

lar shaft for indicating the movement, of

I said cross slide whereby to indicate the I v "depth of cut made by thecutting tool. 6'. The combination with the carriage and I the crossslide of a-lathe, of a tubular shaft carried by said carriage, acrossfeed shaft carried by said carriage for actuating the tubular shaft, acam carried by said tubular shaft and operatively connected to saidcross slide for moving the .crossslide, a sleeve within said tubularshaft terminating in a micrometer collar, :a geartrain operativelyconnecting said tubular shaft with said sleeve, and a" micrometer barhoused within said sleeve and movable longitudinally there- I Intestimony whereof I aflix my signature. I

of, there being inte'rfitting screw threads,

